The Andriod app you are using is it Dslrdashboard or Qdslrdashboard ?
Also what version is the app ?
The version Qdslrdashboard 1.07 has ony been out from August 2nd and has to be downloaded from the link ..
http://dslrdashboard.info/downloads/
For other people it is not in the Google play store !
You have to give permission to install non play store apps in the settings of your android tablet